The QTOF-MS spectrum of 5 gave the molecular formula of C27H30O12 from the pseudomolecular ion peak at m/z 569.1638 [M + Na]+. The 1D and 2D NMR spectroscopic patterns of 5 were similar to those of 4, displaying a 5,7-dihydroxy-flavone, a C-linked β-boivinopyranoside and an O-linked β-d-glucopyranoside. The difference between 4 and 5 was the C-glycosidic linkage of the β-boivinopyranosyl group to the aglycone, which was confirmed by the HMBC correlations of H-1″ (δH 5.71) to C-7″ (δC160.1), C-8″ (δC 160.1) and C-9″ (δC 160.1), indicating that the boivinosyl group was linked to the C-8 position. Thus, compound 5 was identified as 5,7-dihydroxyflavone 7-O-β-d-glucopyranosyl-8-C-β-boivinopyranoside.